The rug is pretty. If it's all natural dye and handspun wool, and you both love it, and it fits the space it's meant to go in, and you can afford it ...
In my experience, when I have bought a rug I fell in love with, I have never regretted it, whether it was a little overpriced or a total bargain. It's the ongoing pleasure it gives that counts in the end.
Some expert here on the forum may be able to tell you if it's grossly overpriced - I'm not knowledgeable about contemporary Gabbeh prices.